Red Lion LD User Manual
Page 8
8
COUNTER RESET AT POWER-UP
COUNTER B DECIMAL POINT POSITION
This selects the decimal point position for Counter B. The selection will also
affect Counter B scale factor calculations.
COUNTER B SCALE FACTOR
The number of input or batch counts is multiplied by the scale factor to
obtain the desired process value. A scale factor of 1.0000 will result in the
display of the actual number of input or batch counts. (Details on scaling
calculations are explained at the end of this section.)*
to
SCALING FOR COUNT INDICATION
The counter’s scale factor is factory set to 1, to provide one count on the
display for each pulse that is input to the unit. In many applications, there will
not be a one-to-one correspondence between input pulses and display units.
Therefore, it is necessary for the meter to scale or multiply the input pulses by
a scale factor to achieve the desired display units (feet, meters, gallons, etc.)
The Count Scale Factor Value can range from 00.0001 to 99.9999. It is
important to note that the precision of a counter application cannot be improved
by using a scale factor greater than one. To accomplish greater precision, more
pulse information must be generated per measuring unit. The following formula
is used to calculate the scale factor.
Scale Factor = Desired Display Units x Decimal Point Position
Number of Pulses
WHERE:
Desired Display Units: Count display units acquired after pulses that occurred.
Number of Pulses: Number of pulses required to achieve the desired
display units.
Decimal Point Position:
0 =
1
0.0 =
10
0.00 = 100
0.000 = 1000
0.0000 = 10000
USER INPUT ASSIGNMENT
The User Input Assignment is only active when Counter B is enabled and the
user input selection perfroms a Reset, Inhibit or Store function on one or both
of the counters.
USER INPUT FUNCTION
COUNTER A COUNT LOAD VALUE
Counter A resets to this value if Reset to Count Load action is selected. To
enter a negative Count Load value, increment digit 6 to display a “-” sign.*
to
* Indicates Edge Triggered function. All others are Level Active functions.
Advance once for each
activation.
Increase intensity one level
for each activation.
Reset setpoint 1 output.
Reset setpoint 2 output.
Reset both setpoint 1 and 2
outputs.
Freeze display for the selected
counter(s) while allowing
counts to accumulate internally.
Display Select *
Display Intensity Level *
Setpoint 1 Reset *
Setpoint 2 Reset *
Print and Reset *
Print Request
Setpoint 1 and 2 Reset *
See Programming Mode
Access chart (Module 3).
Edge triggered reset of the
selected counter(s) after
storing the count.
Store and Reset
Store
Inhibit counting for the
selected counter(s).
Level active reset of the
selected counter(s).
Inhibit
Maintained Reset
Program Mode Lock-out
User Input disabled.
DESCRIPTION
No Function
DISPLAY
MODE
Serial transmit of the active
parameters selected in the Print
Options menu (Module 5).
Same as Print Request followed
by a momentary reset of the
selected counter(s).
EXAMPLE: The counter display is used to indicate the total number of feet
used in a process. It is necessary to know the number of pulses for the desired
units to be displayed. The decimal point is selected to show the resolution in
hundredths.
Scale Factor =
Desired Display Units x Decimal Point Position
Number of Pulses
Given that 128 pulses are equal to 1 foot, display total feet with a one-
hundredth resolution.
Scale Factor =
1.00 x 100
128
Scale Factor = 0.007812 x 100
Scale Factor = 0.7812
COUNTER B BATCH COUNT ENABLE
The Counter B Batch Count function internally counts the number of output
activations of the selected setpoint(s). The count source for the batch counter
can be SP1, SP2 or both. Batch counting is available in all count modes except
Dual Counter, which uses an external input signal for Counter B.
*For value entry instructions, refer to selection/value entry in the Programming
The Meter section.
The selected counter(s) will reset at each meter power-up.
Shaded area selections only apply when Counter B is enabled (Dual Count
mode or batch counter).